mediawiki-skins-Vector/resources/common/components/MenuDropdownCheckbox.less

@import '../variables.less';

/**
 * Common styles responsible for hiding/showing the Vector dropdown.
 */

/**
 * Vector Dropdown. Contains the dropdown label, checkbox, and
 * dropdown content.
 */
.vector-menu-dropdown {
	position: relative;

	// Dropdown menu container. Hidden by default until checkbox is checked.
	> .vector-menu-content {
		position: absolute;
		top: 100%;
		left: -@border-width-base;
		opacity: 0;
		height: 0;
		visibility: hidden;
		overflow: hidden;
		// The menu content should not be narrower than the menu button.
		min-width: 100%;
		margin: 0;
		padding: 0;
		z-index: @z-index-menu;
	}

	// Dropdown <ul> element.
	> .vector-menu-content-list {
		list-style: none;
	}

	// dropdown list items.
	.mw-list-item {
		padding: 0;
		margin: 0;

		a {
			// displays all links in a single column.
			display: block;
			white-space: nowrap;
			cursor: pointer;
		}
	}

	.selected a,
	.selected a:visited {
		color: @color-link-selected;
		text-decoration: none;
	}
}

/**
 * Invisible checkbox covering the dropdown menu handle.
 */
.vector-menu-checkbox {
	cursor: pointer;
	position: absolute;
	top: 0;
	left: 0;
	z-index: @z-index-menu-checkbox;
	opacity: 0;
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	// Hide the checkbox completely in browsers that don't support :checked
	display: none;

	// Hide and show menu content based off checked status.
	&:checked ~ .vector-menu-content {
		opacity: 1;
		visibility: visible;
		height: auto;
	}

	:not( :checked ) > & {
		// When the browser supports :checked, display it
		display: block;
	}

	// Add focus state to menu dropdown buttons (i.e. #p-variants, #p-cactions)
	&:focus + .vector-menu-heading {
		// Simulate browser focus ring
		outline: dotted 1px; // Firefox style
		outline: auto -webkit-focus-ring-color; // Webkit style
	}
}